Question about 2001 Jeep Cherokee

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1997 4.0 jeep no power to coil asd relay good, ign fuse good. need to know what else to do???

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  • Denis Aube May 11, 2010

    How did you check the ASD relay for being good?



    These relays shut back off after about 2 seconds if they don't sense an engine RPM, thus cut power to the ignition coil.

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Crank sensor

Posted on Sep 18, 2008

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2004 pt cruiser keeps blowing fuel pump fuse,replaced fuel pump, no change.runs rough at idle and stalls,blows fp fuse,also replaced ign.coil,plug wires and plugs also changed relays


There are two fuses for the fuel pump relay. One fuse is load side of relay, that fuse also sends voltage to load side of asd relay, the asd relay sends voltage to several systems, two of which are the fuel injectors and ignition coil. I'm not telling you to replace, anything, but, you need to do some testing.
The other fuse goes to control side of relay, smaller amp fuse. I don't know the amp rating of the fuse that keeps blowing.
See that fuse, it supplies voltage to load side of fuel pump relay and also to asd relay.
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Oct 22, 2016 | 2004 Chrysler PT Cruiser

1 Answer

1997 neon will not start


Check the ASD relay in under hood fuse/ relay box. ASD stands for automatic shut down relay. Powers up pcm ,fuel injectors and ignition system an O2sensor heaters .crank over the car an check for power at O2sensor heater fuse in the underhood fuse box ,no power means bad relay !

Jan 18, 2015 | Cars & Trucks

1 Answer

My dodge neon 2002 has no power to coil pack


Check to see if there is power to the injectors. They are fed from the same fuse and relay. If there is no fuel pressure than the fuse would be the fist suspect sin the ASD and fuel pump relay are fed off the same fuse. The fuse is fuse 21 in the power distribution center.

If the fuse is good try swapping the ASD relay with another relay in the fuse block that is the same. If you know have spark than replace the ASD relay.

Apr 24, 2014 | Dodge Neon Cars & Trucks

1 Answer

No want to start,no light check engine on,


Maybe I can give a little help. Do you have the 4.0 liter straight six engine? This should apply as well if you have the V8 engine.

:...no check engine light...:With key on, does the light turn on? If not, it may not be getting power. Have to check that first, check all fuses in the under hood relay/fuse block. The check engine light should turn on with key in on position, just as an alert that the PCM is powered, and ready to work.

"...no electric to coil..." With key on, the dark green/black wire to the coil should have battery voltage. In that fuse/relay block will be a relay called an Automatic Shut Down relay (ASD relay). When the PCM turns this relay on, power is sent to the ignition coil on the green/black wire. The power feed for the ASD relay is fuse 2, a 20 amp fuse in the Power Distribution Center -the fuse/relay block under the hood.

So you have a couple of things to check: Make sure the PCM is powered. If it is, hold your finger lightly on the ASD relay while someone turns the key to on. You should feel it click on. If it does, but no power at the coil, check if fuse 2 is sending power to the relay, and check the green/black wire from relay to coil. If no relay action, possibly a bad relay, or the PCM is not turning the relay on.
Good luck. Let me know what you find.

Jan 04, 2014 | 1995 Jeep Grand Cherokee

1 Answer

I have an 89 jeep Comanche, im not getting power to the fuel pump,and ive followed the wire as far as I could,also,the pump is good i ran power directly to it,fuses are good too ,and im not sure which...


look for asd relay try swaping the relays around make sure the ign switch is powering relays and dont forget make sure the grounds are clean and good and hooked up

Aug 19, 2013 | 1989 Jeep Comanche

1 Answer

No hot wire to the coil 1997 Plymouth Voyager 3.3


Does the check engine light come on whe you turn the key to ON? It should come on, just as a little alert to you that the pcm is powered, and then go off once the engine is running. I'm not certain, but I believe on your car that the coil signal comes direct from the pcm, the engine computer. Check all the fuses in the power distribution center, especially a pcm fuse if you have one there. The Automatic Shut Down relay (ASD relay) is also there in the box. This relay cuts power to the coil and to the injectors when key is turned to off. Maybe something is going on there, you might try a different relay just to check. I think the A/C relay may be the same as the ASD relay, check the numbers on the relays. One shoulde be swappable with the ASD relay.
Good luck, I don't know what else to suggest. It would help you to find a wiring diagram just to check the engine ignition aqnd starting circuit, see how the coil gets its signal. Car repair manuals do have wiring diagrams.

Jul 06, 2012 | 1997 Plymouth Voyager

1 Answer

Asd relay not operating


The ASD is what powers the fuel pump relay you need to check the engine fuse box junction for open fuse especially the fuel pump fuse and the ignition fuse. Get the ASD power corrected and the fuel pump injectors coil and reference will be back in action,check the fuse especially fuse No.23

Mar 26, 2012 | 2002 Jeep Wrangler

2 Answers

1993 jeep grand cherokee larado hose broke in back of motor got everything wet. car shut off and would not start, replaced the crand senser.and got no spark from coil,check for power, no power at coil...


Check the ignition coil harness you may have a bad connection.When you turn the key on the relay ASD should click without the ASD relay operation expect no power to coil and even no fuel pump. Do this turn the key on and cycle the switch you should hear the fuel pump activate. If you dont check the fuse.For the coil to have no power you may have bad connection on the harness or connection.Go to the ignition coil on the B+ that is battery power apply battery power and see it it starts. If it doesnt you will need to inspect ignition control modulecansmo_197.gif

Sep 10, 2011 | 1993 Jeep Grand Cherokee

1 Answer

My 97 grand cherokee is not getting any voltage to the coil already checked the asd


You may have a bad crank sensor or PCM, or ignition module. Or you may have a ign or PCM fuse that popped.

Dec 17, 2009 | 1997 Jeep Grand Cherokee

4 Answers

No spark and no gas now what


Hi,

If you have no spark and no fuel pump operation,I would strongly suspect the Auto Shut Down relay.
The Auto Shut Down (ASD) Relay supplies power to the ignition coil, fuel injector, electric fuel pump, and the oxygen sensor heater element as long as the key is in the START or RUN position and the Single Module Engine Controller (SMEC) is receiving a reference signal from the distributor.
If the SMEC receives no distributor reference signal for two seconds or more the SMEC interrupts power to the ignition coil, fuel injectors, electric fuel pump, and the oxygen sensor heater element by removing the ASD relay ground.

Thanks for contacting Fixya.

Jul 26, 2009 | 1996 Jeep Grand Cherokee

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